Year Dollars 2002-01-01 25264912 2003-01-01 36486205 2004-01-01 32930358 2005-01-01 44191790 2006-01-01 50331972 2007-01-01 91142880 2008-01-01 67079888 2009-01-01 56983919 2010-01-01 180613466 2011-01-01 277288586 2012-01-01 589195450 2013-01-01 410637155 2014-01-01 538079359 2015-01-01 531006916